Remove/install drive pinion

AR35.30-B-0458XC

Remove/install drive pinion

24.08.2020

Rear axle

743 in model 384.201/223

Modification notes

30.10.2019

Collar nut of the pinion drive flange

BA35.30-B-1002-03H

1

Collar nut

2

Yoke coupling

3

Radial seal

4

Tapered bearing

5

Tapered roller bearing outer race

6

Tapered group housing

7

Spacer washer

8

Spacer sleeve

9

Tapered roller bearing outer race

10

Tapered bearing

11

Pinion

1

Collar nut

3

Radial seal

5

Tapered roller bearing outer race

6

Tapered group housing

9

Tapered roller bearing outer race

11

Pinion



Remove

1

Remove the central tapered group

.

AR35.30-B-0432XB

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

2

Remove the crown with the differential

.

AR35.30-B-0464XC

3

Unlock the collar nut (1)

.

AR35.30-B-0432-05XB

4

Remove the collar nut (1) and the Yoke coupling (2)

 Retainer wrench

*717589003100

 Socket wrench bit

*000589120900

5

Remove the pinion (11)

 For the removal, install again the collar nut to protect the pinion's thread and avoid its falling. Tap the pinion shaft with the aid of a hammer and a brass billet until it is removed.

6

Remove the radial seal (3)

7

Remove the tapered roller bearing (4), the spacer washer (7) and the spacer bushing (8)

8

Remove the outer races (5) and (9) from the tapered group housing (6)

 Use a hammer and a brass billet.



Check

9

Inspect the tapered roller bearings for wear



If necessary, replace the bearings.



Pull tapered roller bearing off drive pinion, press on
.

AR35.30-B-4300-01XB



Install

10

Install the tapered roller bearing (10) on the pinion (11)

.

AR35.30-B-4300-01XB

 In the case of tapered roller bearings replacement.

11

Install the outer race (9) in the tapered group box (6)



At the installation of the outer race (9), it is necessary to determine the pinion's assembly measure (basic depth).



Determine installed dimension of drive pinion gear
.

AR35.30-B-0458-01XC

12

Install the pinion (11), the outer race (5), the spacer bushing (8), the spacer washer (7) and the tapered roller bearing (4) in the tapered group box (6)

 The spacer washer is supplied with 1.20 mm, with increments of 0.01 mm, up to 2.00 mm.

 For the installation of the tapered roller bearing (4), heat it up to 80 °C.

Determine the spacer washer (7) thickness for the correct frictional torque of the pinion.



Determine shim thickness on drive pinion
.

AR35.30-B-0470-03XC

13

Install the radial seal (3)

 Use a new radial seal.

 Apply a sealing agent to the outer surface of the seal.

Sealant

*BR00.45-Z-1112-01A

 Drift

*744589001500

14

Install the Yoke coupling (2), the collar nut (1) and tighten it up to the prescribed torque

 .Collar nut of the pinion drive flange

*BA35.30-B-1002-03H

 Retainer wrench

*717589003100

 Socket wrench bit

*000589120900

15

Check the frictional torque of the pinion bearings

.

AR35.30-B-0470-04XC

.Frictional torque of the bearings

*BE35.30-B-1003-01F

16

Lock the collar nut (1)

.

AR35.30-B-0432-03XB

17

Install the bevel gear with the differential

.

AR35.30-B-0464XC

18

Install the central tapered group

Remove/install differential assembly
.

AR35.30-B-0432XB

Rear axle actuation

Number

Designation

Rear axle 743.453/454/457

BE35.30-B-1003-01F

Frictional torque of the bearings

Nm

5...13

 Central actuation with differential

Number

Designation

Rear axle 743.457 in Vehicle 384.2

BA35.30-B-1002-03H

Collar nut of the pinion drive flange

M40x1.5

Nm

500

M45x1.5

Nm

-

M55X1.5

Nm

-

M32x1.5

Nm

-

Repair materials

Number

Designation

Order number

BR00.45-Z-1112-01A

Sealant

3M - 847